SHEN Pu-sheng , MENG Huan-ling
Abstract:By the comparison between two methods of calculating the maximum drift angle,it was found that the method of obtaining the angle from the differential coefficient of coordination deformation equation twice was feasible.Based on the principle of continuous
YANG Ming-hui , ZHAO Ming-hua , YAO Qi-yang
Abstract:After analyzing the general calculation methods of pile-soil stress ratio and pointing out their defects,this paper derived a new formula to calculate the stress-strain of pile and soil in loading process by using the theory of round-hole expansion and th
ZHOU Fen , SHANG Shou-ping , DU Yun-xing
Abstract:以室外大比例框架结构(1∶2)模型自振频率测试结果为基础,采用Nastran程序分5种有限元模型4种工况计算了结构的自振频率,工况中包括了单元类型、单元位置偏置、地基条件和结构配筋等因素的影响.计算表明,考虑土结构相互作用(SSI)的计算结果比考虑刚性地基的结果低;较为准确的有限元计算模型应采用实体单元,并考虑配筋及上下部共同作用;在小震情况下,采用现行框架结构设计方法建模计算偏于不安全,这与通常的设计结论不一致.
ZHU Zhi-wen , CHEN Zheng-qing , GU Ming
Abstract:Based on the arbitrary-Lagrangian-Eulerian descriptions for a rigid oscillating body and by using the moving mesh technique,the fluid field around the ideal thin plate(ITP) in sinusoidally heaving or pitching motions was simulated by numerical method.Afte
LUO Qi-zhi , LIU Guang-dong , Du Jia-bin
Abstract:The homogeneous solutions of the differential equations for shear lag used as the displacement patterns of the finite segment were presented.A finite segment model with consideration of bending,torsion and shear lag was established.The stiffness matrix an
HUANG Liang , HUANG Zheng-yu , WANG You
Abstract:Considering the nonuniqueness and instability of ultrasonic computerized tomography for structural concrete as well as the ultrasonic transmission characteristics in concrete,a natural weight matrix with clear physical meaning was introduced in the invers
LI Xiao-hua , LI Nian-ping , ZHAO Dan-dan , RUAN Fang
Abstract:In order to study the indoor air temperature characteristics of a chilled wall space with underfloor air supply,This paper made some modifications to the conventional multi-zonal model.The modified multi-zonal model had three parts,i.e.a wall flow module,
LUO Qing-hai , TANG Guang-fa , HUANG Wen-sheng , GONG Guang-cai
Abstract:A novel instantaneous water heater was developed by means of integrating a thermoelectric(TE) heat-pump with a separating thermo-siphon.Firstly,a flat-type separating thermo-siphon was investigated to obtain optimum filling rate,distribution of temperatur
HE Yi-bin , FAN Hai-tao , XIA Dong-zhou , XIAO A-lin
Abstract:After investigating the development trend of damping ratio of building,this paper discussed the mechanism of non-linear damping and analyzed the dynamic responses of Single Degree of Freedom(SDOF) with non-linear damping ratio under various loads by numer
BAI Zhong-hao , CAO Li-bo , YANG Jian
Abstract:Based on the analysis of the discharge characteristics of power batteries used in pure electric vehicle,this paper pointed out the shortage of using the constant current discharge method to assess the performance of the batteries,because the results could
HAN Xu , TIAN Jian-hui , LONG Shu-yao , WU Heng-an , XIE Gen-quan
Abstract:A novel method that combined molecular dynamics and finite element analysis was suggested to investigate the mechanics behavior of nano-beams.This method took the advantages of the efficiency of continuum mechanics method and the accuracy of atomistic sim
ZHANG Fei-tie , ZHOU Yun-shan , XUE Dian-lun
Abstract:This paper discussed the control algorithm of vehicle starting clutch,which is one of the key technics for Continuously Variable Transimission(CVT) control.Considering various conditions of vehicle starting and indeterminate intentions of drivers,a fuzzy
PENG Xian , YIN Xin-feng , FANG Zhi
Abstract:The dimensionless differential equations of the motion of a coupled system,which consists of a girder bridge with arbitrarily surface irregularities and a vehicle with arbitrarily variable speeds,were derived before and after a tuned mass damper(TMD) was
WANG Yao-nan , WANG Shao-yuan , MAO Jian-xu
Abstract:Fractal dimension involves both the spatial and gray level distribution information of image. A new image texture analysis method based on fractal dimension was presented. Firstly six grey level transformations were done on original texture image, and the
WANG Hui , XU Feng , HE Chao-ying
Abstract:The Thyristor Controlled Series Compensator(TCSC) system with disturbances is a class of nonlinear system.This paper aimed at the influences of the disturbances on the TCSC system dynamic performances,and presented a new kind of controller for TCSC based
LIAO Dong-ping , WEI Xi-zhang , LI Xiang , ZHUANG Zhao-wen
Abstract:This paper analyzed the radar recognition ability of two kinds of air targets,i.e. helicopter and fixed-wing aircraft.The bispectrum features of the two kinds of targets were analyzed under the condition that the recognition ability was satisfied. Their d
CHEN Zhen-hua , LIU Hui-yu , ZHANG Fu-quan , CHEN Zhang , ZHANG Zhi-gong
Abstract:The process of Ni-Al solid-liquid reaction milling,the powders product and their pureness were investigated by adding HCl,NaCl,KCl,Na_2SO_4 and stearic acid as process control agent.The phases identification was analyzed by D5000 X-ray diffraction,and the
CHEN Xian-hong , CHEN Xiao-jin , ZHONG Wen-bin , CHEN Xiao-hua , CHEN Zhen-hua
Abstract:利用丁二酸酰基过氧化物分解产生的羧酸自由基与多壁碳纳米管(MWCNTs)进行自由基加成反应,对其侧壁实现羧酸化,并依次对其进行酰氯化、胺化处理,获得侧壁酰胺化的MWCNTs.采用FT-IR,Raman以及UV-Vis光谱对其进行了表征.结果表明:碳管表面接枝上了羧酸基团,且数量较纯化后的碳管有较大幅度的增加,表征其结构缺陷的I(D 2D)/IG比值增加了0.2,同时酰胺化的MWCNTs紫外可见光谱在320 nm处出现了—CONH—键的π→π*跃迁的吸收峰.
LI Qi , LIU Jing-hua , XIONG Ying , ZENG Xi , LI Ya-lin
Abstract:运用电化学阻抗谱和稳态直流极化法研究了LiBOB.(PEO)n聚合物电解质膜的性能;用恒电流充放电测试研究了以LiBOB作锂盐的电池的循环性能.结果表明,LiBOB具有好的导电性能,O与Li的摩尔比为16∶1时,LiBOB.(PEO)n膜室温下的电导率最高为5.8×10-6S/cm,锂离子迁移数t =0.39;LiBOB的大电流充放电性能有待改进.
XU Xin-hua , LIU Feng-wei , LIU Wen-qi , QU Shu-cun , QIU Ren-hua
Abstract:通过固相熔融的方法,使4,4′-联吡啶与磺酸酯或苄溴进行反应.结果表明,将反应固体混合物加热到融化, 在30 min内完成反应.通过控制反应物的投料比,可以高选择性的产生单取代或双取代 4,4′-联吡啶衍生物.当4,4′-联吡啶与磺酸酯或苄溴摩尔比为1.0∶2.1时,生成双取代产物, 收率近100%;当摩尔比为10∶1.0时,生成单取代产物,收率达90%.
YANG Wei-jun , TAO Neng-ye , LIU Feng-liang , LI Zi-yang , GUO Can-cheng
Abstract:以Fe,Ni为主活性组分,K,Mo,Co等为助催化成分,采用多步浸渍、直接高温分解、再分步还原的办法,使其负载于国产活性炭载体上,研究了Ni,Fe两类催化剂对氨的催化分解性能.结果表明,活性炭负载的Fe催化剂比负载的Ni催化剂的活性高.Fe-Mo/C的催化活性最好,在650℃时就能使氨气基本分解完全.助催化成分对Fe催化剂活性促进作用大小顺序是Mo>K>Co,而K,Mo对Ni催化剂活性的促进作用很小.XRD研究表明,Fe-Mo/C催化剂的主要晶相为FeMo,Fe2(MoO4)3,Fe2O3及少量的Fe3O4和石墨化C;催化反应后,出现了-αFe和较多的石墨C晶相,Fe2(MoO4)3及Fe2O3,Fe3O4衍射峰基本消失,表明铁化合物已被还原,且活性炭进一步石墨化了.FeMo化合物的形成是Fe-Mo/C活性高的一个重要因素.
LIU Hui-fen , LI Wei , WANG Yu , JIANG Ping , GUO Cong
Abstract:According to the repetitive protein sequence and partial cDNA sequence of Nephila clavipes spider's major ampullate spidroin 1 gene,a synthetic gene repetitive monomer of 105 bp encoding 33 repetitive amino acid of spider silk protein was designed and syn
LI Cai-ting , LI Shan-hong , LI Si-min , CHEN Zhi-liang , CHEN Ping
Abstract:对自行研制的斜板湿式除尘脱硫器,利用计算流体力学(CFD)中的fluent软件,选择k-ε模型和SIMPLE算法,对其内部气流流场进行数值模拟.结果表明,入口处、斜板处存在旋涡,湍流剧烈.旋涡的存在延长了气流的停留时间,增加了相间接触机会,可减少和消除死角.最后,选取入口管和出口管的某断面进行实验验证.结果表明:入口、出口某断面处实验与模拟值吻合较好,两者的相对误差在1%~3%.
SUN Wei , ZENG Guang-ming , WEI Wan-zhi , HUANG Guo-he , WEI An-lei
Abstract:To effectively estimate parameters varying within wide range for microbial biodegradation kinetics,a genetic algorithm with Instantaneous Elitist Protection Strategy(IEPGA) and an improved genetic algorithm(IGA) were developed and compared with the method
ZOU Bei-ji , FU Hong-pu , ZHU Jiang
Abstract:给出了一种提取广义开关网络中两节点间“最小”连接矩阵的方法.该方法采用广度优先和深度优先结合遍历提取出两顶点间的连接矩阵,再结合Tarjan拓扑图块划分算法和“不跨越已知割点遍历”思想降阶使矩阵达到“最小”.将继电控制线路抽象为开关网络,通过连接矩阵计算出驱动元件的开关函数,从而掌握电气信息.使用“批”的概念描述继电控制线路中的事件时序.基于以上两点,再利用继电控制线路图上表达出的驱动元件与开关之间的关系,可实现对继电控制线路进行功能分析的CAD方法.
Abstract:This paper proposed a cascadic multigrid(CMG) method for parabolic problems in domains with re-entrant corners,whose corresponding convergent results were obtained.The results show that the iterative solution of the CMG method has the same steps as the di
GONG Li-sha , HU Xi-yan , ZHANG Lei
Abstract:This paper discussed the necessary and sufficient conditions for the existence of symmetric nonnegative definite solutions of a matrix inverse problem with a submatrix constraint.The expressions of the general solutions under solvable case were obtained.F
OU-Yang Yu , PENG Jing-cui , PENG Zhi-hua
Abstract:采用π电子紧束缚近似方法,对处于稳定磁场中考虑电子自旋情况下的单壁碳纳米管的电子结构进行了理论分析.发现磁场中的SWNTs的子能带和磁通量是量子化的,其子能带以Φ0为周期随Φ作周期性变化;并出现了金属-半导体的周期性转变现象.
Abstract:In the evaluation methods of groundwater pollution, most domestic researches only study the evaluation on different contaminations index and the degree of pollution, and the factors about economic are barely considered. Therefore, the result of evaluation